A tax starting at $20 a metric ton of carbon dioxide
equivalent and rising at about 6 percent a year could raise $154
billion by 2021, Nick Robins, an analyst at the bank in London,
said today in an e-mailed research note, citing Congressional
Research Service estimates. “Applied to the Congressional
Budget Office’s 2012 baseline, this would halve the fiscal
deficit by 2022,” Robins said.